This paper introduces a method to esitimate the spectrum of voiced speech in noise, based on an estimate of the fundamental frequency. The method uses the output of an auditory model that imitates the mechanics of the basilar membrane. The output of the segments of the model is used as an input to a set of leaky autocorrelator units (as simple neuron models) sensitive to a certain periodicity (...

A series of experiments was conducted to determine (1) the accuracy with which vowel segment durations in spoken sentences can be represented in auditory sensory storage and (2) the extent to which phoneme boundaries in the identification of phonemic vowel length in Dutch are affected by syntactic and/or auditory-phonetic context. In a preliminary production test it was found that durations of ...

Vowel spectral noise was studied in the sustained phonations of 48 men representing two levels of physiological condition (good and poor) within each of three chronological age groups (25 to 35, 45 to 55, and 65 to 75 years). Results indicated physiological condition was significantly correlated with noise rankings, whereas chronological age and noise were not significantly correlated. These fi...

Vowel perception ability for 16 prelingually deafened children using Nucleus 22-channel cochlear implants was studied at 12, 24, and 36 months postimplantation. Information transmission analysis was used to evaluate the effectiveness of the implants in conveying the essential cues required for accurate vowel identification and whether the cues used varied with experience or device use. Individu...

When synthetic fricative noises from a [f]-[s] continuum are followed by [a] or [u] (with appropriate formant transitions), listeners perceive more instances of [s] in the context of [u] than in the context of [a]. Presumably, this reflects a perceptual adjustment for the coarticulatory effect of rounded vowels on preceding fricatives. In Experiment 1, we found that varying the duration of the ...

Single-unit responses were studied in the ventral cochlear nucleus (VCN) of cats as formant and trough features of the vowel /epsilon/ were shifted in the frequency domain to each unit's best frequency (BF; the frequency of greatest sensitivity). Discharge rates sampled with this spectrum manipulation procedure (SMP) were used to estimate vowel representations provided by populations of VCN neu...